events - Angular Dart 组件事件

Question

我正在尝试将自定义事件从组件传递到其父组件/ Controller

确认.html

<div class="comfirm-component">
    <content></content>
    <a href="#" ng-click="ctrl.yes()">Yes</a>
    <a href="#" ng-click="ctrl.no()">No</a>
</div>

确认.dart

@Component(
    selector: "confirm-component",
    templateUrl: 'confirm.html',
    useShadowDom: false,
    publishAs: "ctrl"
)
class ConfirmComponent {
    void yes(){
        print('yes');
        // Fire confirm-yes event
    }

    void no(){
        print('no');
        // Fire confirm-no event
    }
}

有这样的事情吗？:

<confirm-component on-confirm-yes="doSomething()" on-confirm-no="doSomethingElse()">
    Do you want to delete
</confirm-component>

我可以使用普通的 StreamController，但随后我必须用代码连接我的组件。

confirmComponent.onConfirmYes.listen()
confirmComponent.onConfirmNo.listen()

我还发现了这个: How to communicate between Angular DART controllers

还有这个: angulardart components - dispatch custom event

在这两个步骤中都提到了scope.emit。但我没有找到一种方法来将它与组件而不是 Controller 一起使用。有 angular.dart v0.14.0 的完整示例吗？

scope.emit 是我正在寻找的东西吗？

Answer 1

这应该是相同的，只需向构造函数添加一个作用域参数，以便组件获得注入(inject)的作用域。

Angular 0.14.0 https://github.com/angular/angular.dart/commit/181f01448555c475869505491159045904e5dc89 中有相关更改

我还没有尝试过这个。 根据描述，您需要实现 ScopeAware

@Component(...)
class MyComponent implements ScopeAware {
  Watch watch;
  MyComponent(Dependency myDep) {
    // It is an error to add a Scope / RootScope argument to the ctor and will result in a DI
    // circular dependency error - the scope is never accessible in the class constructor
  }

  void set scope(Scope scope) {
     // with this scope you should be able to use emit
     // This setter gets called to initialize the scope
     watch = scope.rootScope.watch("expression", (v, p) => ...);
  }
}